+ Site Statistics
+ Resolve Accession
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
Submit PDF Full TextSubmit PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Effects of temperature and ph on the water exchange through erythrocyte membranes nmr studies

, : Effects of temperature and ph on the water exchange through erythrocyte membranes nmr studies. Journal of Membrane Biology 62(1-2): 1-6

The temperature and pH dependence of water exchange was studied on isolated human erythrocytes suspended in isotonic buffered solutions. At pH 7.4 a break in the Arrhenius plot of water exchange time at around C was found. The mean value of the apparent activation energy of the water exchange time at temperatures higher than that of the discontinuity was 5.7 kcal/mol (.+-. 0.4); at lower temperatures the values of the apparent activation energy were below 1.4 kcal/mol. The pH dependence of water exchange time of isolated erythrocytes revealed a marked increase of the water exchange time values in the acid range of pH; a much smaller variation of the same parameter occurs between pH 7.0 and 8.0. These findings could be correlated with other processes involving erythrocyte membranes that showed similar pH and temperature dependence and were considered to indicate state transitions in the membranes. The temperature and pH effects on water diffusion indicate that conformational changes and cooperative effects are implicated in the mechanism of this transport process.

(PDF 0-2 workdays service)

Order PDF Full Text


Click here to order any other PDF Full Text

Accession: 005328671

PDF Full Text: Submit

Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:

Other references

Lowry, Dorothy C.; Lerner, I. Michael; Taylor, Lewis W., 1956: Intra-flock genetic merit under floor and cage managements. In an experiment extending over 4 years, means and variabilities of egg production traits of pullets housed in floor pens were compared with means and variabilities of their full sisters housed in individual cages. Floor pullets were found usually...

Fiesinger Donald W.; Nicholls J. W., 1973: Quaternary Volcanic Rocks in East Central British Columbia. Eos, Transactions, American Geophysical Union: , Pages 511. 1973.

Cutler, Adrian J.; Squires, Timothy M.; Loewen, Mark K.; Balsevich, John J., 1997: Abscisic acid induces abscisic acid 8 hydroxylase in corn cells. Plant Physiology (Rockville) 114(3 SUPPL ): 164

Stephens, C. E.; Tanious, F.; Kim, S.; Wilson, W. D.; Schell, W. A.; Perfect, J. R.; Franzblau, S. G.; Boykin, D. W., 2001: Diguanidino and reversed diamidino 2,5-diarylfurans as antimicrobial agents. Dicationic 2,5-bis(4-guanidinophenyl)furans 5a-5f, 2,5-bis[4-(arylimino)aminophenyl]furans 6a-6b and 6e-6k, and 2,5-bis[4-(alkylimino)aminophenyl]furans 6c-6d have been synthesized starting from 2,5-bis[tri-n-butylstannyl]furan. Thermal melting st...

Senay Arikan; Mithat Bahceci; Alpaslan Tuzcu; Fatma Celik; Deniz Gokalp, 2012: Postprandial hyperlipidemia in overt and subclinical hypothyroidism. Lipid alterations in overt hypothyroidsm (OH) were well known, but its changes in subclinical hypothyroidism (SCH) and postprandial period were not clear. The aim of this study is to evaluate postprandial lipemia by oral lipid tolerance test (OL)...

Anonymous, 2011: Incidence of Severe Adverse Neonatal Outcomes Use of a Composite Indicator in a Population Cohort. The aim was to develop a composite outcome indicator to identify infants with severe adverse outcomes in routinely collected population health datasets, and assess the indicator s association with readmission and infant mortality rates. A comprehe...

Wagdi, Philipp; Alkadhi, Hatem, 2012: Can computer tomography help predict feasibility of transseptal puncture after percutaneous closure of an interatrial septal communication?. Transseptal puncture (TSP) is the first step in pulmonary vein isolation and catheter ablation, as well as in left atrial appendage closure in atrial fibrillation. Although TSP has been reported to be successful in patients with device closure of...

Nobuhara M., 1988: The in vivo antitumor effect and the mechanism of human natural tumor necrosis factor. Purified human natural tumor necrosis factor (n-TNF) was prepared from the culture medium of stimulating human leukemic B cell line (BALL-1) with Sendai virus. In vivo studies revealed that n-TNF suppressed the tumor growth of three murine and sev...

Schlufter, Kerstin; Liebert, Tim; Heinze, Thomas; Budtova, Tatiana; Gericke, Martin, 2009: Rheological Properties of Cellulose/Ionic Liquid Solutions From Dilute to Concentrated States. Biomacromolecules 10(5): 1188-1194

Conn, K. L.; Abbasi, P. A.; Lin, Y.; Lazarovits, G., 2003: Reduction of potato scab with volatile fatty acids and acidified liquid swine manure in soil amendments. Canadian Journal of Plant Pathology 25(4): 422, December